Next month, the Senate intelligence committee is expected finally to release portions of its report on the Central Intelligence Agency’s (CIA) torture program under President George W. Bush. But the long-awaited findings have already come under criticism by those representing four victims of torture who have wondered why Senate investigators never bothered to question their clients.

Their attorneys say the failure to include the men’s testimony in the report raises questions about the thoroughness of the Senate probe.

“If you’re conducting a genuine inquiry of a program that tortured people, don’t you begin by talking to the people who were tortured? It seems here, as far as my client is concerned, no effort was made to do that,” David Nevin, who represents Mohammed, told The Guardian.

Three of the four men— Mohammed, Nashiri and Zubaydah—were waterboarded, the CIA has admitted. Mohammed was subjected to the procedure 183 times, while Zubaydah got it 83 times and Nashiri two or three times. Nashiri was “also threatened with a gun and a power drill,” according to The Guardian’s Spencer Ackerman. Bin Attash was doused with cold water and then wrapped in plastic sheeting before being interrogated at a secret prison in Poland.